1. Department of Cardiology, The Second Affiliated Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China (mainland)
2. Department of Preventive Medicine, Changzhi Medical College, Changzhi, Shanxi, China (mainland)
3. Department of Cardiology, Tianjin Medical University General Hospital, Tianjin, China (mainland)
4. Department of Cardiology, Traditional Chinese Medicine Hospital of Tianjin Beichen District, Tianjin, China (mainland)